Sticky/slower searching

[mazraf]

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
	
	// remove all data that belongs to the previous search
	[TtableData removeAllObjects];
	[RtableData removeAllObjects];
	[BtableData removeAllObjects];
	
	if([searchText isEqualToString:@""] || searchText==nil) {
		[myTable reloadData];
		return;
	}
	
	NSString *searchLower = [searchText lowercaseString];
	
	NSInteger counter = 0;
	
	for(NSString *name in BdataSource) {
		NSString *nameLower = [name lowercaseString];
		NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];
		NSRange r = [nameLower rangeOfString:searchLower];
		
		if(r.location != NSNotFound) {
			[RtableData addObject:[RdataSource objectAtIndex:counter]];
			[TtableData addObject:[TdataSource objectAtIndex:counter]];
			[BtableData addObject:[BdataSource objectAtIndex:counter]];
		}
		
		counter++;
		[pool release];
	}
	
	[myTable reloadData];
}

This is the search method employed by my program. I used to have my program set up so that you had three windows. Navigation, search, and detail. Normally, you would make a selection in navigation and it would go straight to detail, but if you wanted to search, you would make a pit stop, and then load detail. With this structure, the search functioned smoothly on my test device.

When I merged search into navigation, and used a BOOL to have the navigation functions switch between normal and searching, the search still worked, but it had slowed down a lot. I keep getting 'sticky buttons' while I'm typing into the search bar.

It's the same code, but . . .
All the arrays were allocated, and initiated in ViewDidLoad. The DataSources were also populated there.
Does anybody know how I can streamline this search, and make it run smoothly again?